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Discussion Starter · #1 ·
Hello,

I am typing this from Pakistan and am having this problem with the car's transmission. The car is a 2000 model E240 avantgarde. The car was constantly going into limp mode with error codes (using STAR diagnosis) 147 and 151. After reading through this website we decided that the car needed a new conductor plate and fluid/filter change.

The car was jacked and all the old fluid was removed and it was burnt and black in color. Car has 177K Kms and this was its first ATF change. The valve body was removed and the conductor plate was changed. The offending sensors had small cracks and one had small bumps on it. At the same time all the Orings were changed on the solenoids and their contacts were cleaned to ensure smooth electrical contacts.

The valve body with new conductor plate was installed in car and new ATF was added. The fluid used is genuine MB ATF and level was topped off with transmission reading at 82 deg C.

Now here is where things go awry. The codes were cleared and the car was driven. It shifted smooth as butter however when engaged in 4th it would slip back to 3rd violently and back to 4th and than back to 3rd. The car would buck around violently and then go back to limp mode and stay in 3rd gear. STAR was connected and now the coded 051 and 151 are shown (target gear not achieved and sporadically gear implausible etc)

Sooooooo whats going on? Going to remove valve body tomorrow and look at the springs in it. Might put old conductor plate back and see if same problem occurs (Might be we were sold a faulty conductor plate). The new conductor plate came in a MEYLE box and we were assured its genuine benz. Am stumped on this problem and any help will be appreciated

Thanks
 

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Discussion Starter · #2 ·
Well we opened up the valve body today and found the solenoid valve spring broken in 3 pieces :eek:

Ordering a replacement and than seeing if problem is solved.

The stickies on this forum have been a great help...kudos to all those who have contributed :thumbsup:
 

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2013 E350/41k, 1997 E320/290k, 1999 FJ100/256k
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Its always good when problems are obvious - hope that's the solution.

With the valve body (VB) out for a while - expect more fluid to drain (maybe 3+ liters).

I had a 2 day gap from remove to replace so put the pan back on and tightened it to catch fluid and more protect the inside from dust, etc.

On install day, drained out the fluid via the drain bolt before taking off pan and installing the VB.
 
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